Loom-shuttle



(No Model.)

J. BALDWIN.

LOOM SHUTTLE. No. 323,554. Patented Aug. 4, 1885.

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UNITED STATES PATENT @einem JAMES BALDVIN, OF MANCHESTER, NEV HAMPSHIRE.

LOOM-SHUTTLE.

SPECIFICATION forming part of Letters Patent No. 323,554, dated August 4, 1885.

A pplcation filed February 14, 1855.

T0 all whom, it may concern.-

Be it known that l, JAMES BALDWIN, oi' Manchester, in the county of Hillsborough, State of New Hampshire, have invented certain new and useful Improvements in Loom- Shuttles, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming a part of this specification, in whieh- Figure l is a reduced vertical longitudinal section of a shuttle provided with my improvement, the spindle being represented as depressed and a portion of the body of the shui tle broken oll; Fig. 2, a like view, the spindle being represented as raised and in elevation; Fig. 3, a vertical longitudinal section of the spindle detached; Fig. 4C, a like View showing a modification of thc bcbbin-spring, and Fig. 5 a reduced vertical longitudinal section showing a shuttle of the same general class, the spindle being represented as depressed and a portion ol' the body of the shuttle broken off.

Like letters of reference ind ica-te corresponding paris in the different figures of the drawings.

My invention relates more especially to means for preventing the bobbin from heilig "knocked off or becoming accidentally detached from the spindle of the shuttle.

Shuttles havcheretolore been provided with springs, the ends of which are fixed in sockets at bot-h ends of the spindle. In that case the spring is not permitted to expand and contract in its sockets, and itis liable to be broken when the bobhin is placed on the shuttle. Shuttlespindles have also been heretofore provided with a bobhin-retaining spring hav. ing one end fixed in a socket at the free end ofthe spindle, the other end being loose in a socket at the lower end of the spindle, and the spindle being provided with a second spring interposed between it and said bobbinretaining spring to canse the latter to press outward against the bobbin. This construction is comparatively cumbersome and expensive.

The object of this invention is to overcome the diiiicnlties above setforth, and provide a (No model.)

spring which will yield with great facility when a bobbin is placed on the spindle.

The nature and operation of the improvement will be readily understood by all conversant with suoli matters from the following planation, its eXtreme simplicity rendering an 'elaborate description unnecessary.

In the drawings, A represents the body of the shuttle; B, the spindle, C, the bohbin, and D the spring. lThe spindle is provided with a catch or head, w, and is pivoted or jonrnaled in the body A on the pin 'i in the usual manner. A hole or socket is formed in the rear of the head sa on its upper side, as shown at d, a corresponding hole or socket being lformed in the shank or heel ol the spindle, as shown at l. An outwardly-curved or elliptic spring, E, is disposed on the upper side ol' thespindie B, the ends of the spring being inserted in the sockets d Z, and its body of such length as to prevent it from being readily detached therefrom.

In the use of my improvement the spindle is elevated, as shown in Fig. 2, and the hobbiu passed on over it in the usual manner nntil the top or outer end of the samehas passed the head ai, when the expansive action of the spring E will cause it to move laterally and its end to engage with said head, thereby locking it in position on the spindle and preventing it from being accidentally detached therefrom in a manner which will be readily obvious without a more explicit description.

It will be understood that the sockets d? are of sufficient depth to permit the spring E to be sufficiently depressed to enable the bobbin O to be readily inserted and removed as required.

A modification of my improvement .is shown in Fig. el, which consists in making the spring E in the form of a double ellipse or bending it inwardly at its center, as seen at t, to Jform the sections e z, this shape being preferable when the spindle is very long,or when more tension is required on said spring than can be readily attained with the single ellipse shown in Figs. 1, 2, and 3.

In Fig. 5 a shuttle-spindle is shown which is now in common use, and therefore not claimed herein. Said spindle is provided with a curved spring, H, one end of which is firmly secured in the head of the spindle and the ICO other inserted in a hole in the shank or heel J, said hole being curved upwardly and opening out through. said shank beneath the spring D.

rlhe spring H is elongated and bent at its outer end to fit the hole in the shank J, and extends upwardly through said shank sufficiently to engage the spring D, said lastnamed spring causing the body of the spring H to act on the bobbin and keep it in engagement with thehcad as when the spindle is depressed. Vhen the spindle is elevated, and the end ot' the spring D passes into the notch or depression e in the shank J, the bent end of the spring H passes out of contact with the spring D, thereby relieving the tension on the spring H and permitting the bobbin to be removed from the spindle.

Although the device last described, and as shown in Fig. 5, possesses some advantages over other well-known methods of securing or locking the bobbin to the spindle, in that it is to a certain extent automatic in its action, itis defective or objectionable in the following respects: First, thespring, where it passes through the hole in the shank J, requires great care in iitting, and to be constantly oiled to have it work freely; second, as there is no pressure or tension on the spring H when the spindle is elevated, careless workmen are liable to withdraw the bobbin to such an extent as to leave it resting on or extending over the head m as the spindle is depressed; third, the spring H, being loose at its outer end, is liable to become bent and spoiled, and is comparatively expensive to replace, and, fourth, it is comparatively expensive to construct.

My invention is designed to obviate these difiiculties and objections, and to that end I make use ofthe sockets d Z and the spring E, said sockets bei ng of suflicent depth to permit the spring to be readily depressed as the bobbin is crowded on over it, and said spring of such a length as to remain in the sockets when the bobbin is removed, this form of construction being exceedingly simple, cheap, durable, and effective.

A longitudinal groove, h, is formed on the upper side ofthe spindle B to receive the spring E as it is depressed by the bobbin, and also to assist in keeping said spring in proper position on the spindle, the sockets ZZ being formed at the ends of said groove. rlhe groove may, however, be omitted, the sockets d Z and spring E being so formed as to prevent said spring from getting out of place. The spring E and sockets d Z may also be placed beneath the spindle or at either side-thereof, if preferred.

Having thus explained my invention, what I claim is- 1. A shuttle-body provided with a spindle pivoted thereto, said spindle having at its opposite ends sockets, which are closed at their outer ends, in combination with a longitudinally-expansible spring the ends of which are loosein said sockets, said spring being adapted to expand longitudi-nally under compression into either socket and to expand laterally without withdrawal ot' its ends from said sockets, substantially as described 2. A shuttle-body provided with a spindle having a longitudinal groove, said spindle having sockets at each end ot' said groove, in combination with a spring having two waves or curves, the central depression of said spring resting in said groove and its ends being free to reciprocate in said sockets, substantially as described.

JAMES BALDVIN.

\Vit1iesscs:

J. F. BALDWIN, J. C. LrrTLEFIELD. 

